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Scientific Method <ul><li>The scientific method is a series of steps taken during an experiment in order to solve a proble...
Why is the Scientific Method Important? <ul><li>Continuity </li></ul><ul><li>Communication within the scientific community...
Steps of the Scientific Method <ul><li>Observation </li></ul><ul><li>State the problem </li></ul><ul><li>Form a hypothesis...
Observations <ul><li>Qualitative observation </li></ul><ul><ul><li>Focus on the qualities of an object. </li></ul></ul><ul...
State the Problem <ul><li>This problem or question is formed from your observations. </li></ul><ul><li>This is the questio...
Form a Hypothesis <ul><li>The hypothesis is a testable explanation to your problem. </li></ul><ul><li>“ Educated Guess” is...
Experiment <ul><li>Design an experiment that tests your hypothesis.  </li></ul><ul><li>Control Group:   test variables are...
Variables <ul><li>Variables – anything that changes throughout the experiment. </li></ul><ul><li>There are two types of va...
Results/Analysis <ul><li>Results </li></ul><ul><ul><li>This section includes all of the data and information  collected. <...
OBSERVATIONS:  Flies land on meat that is left uncovered.  Later, maggots appear on the meat. HYPOTHESIS: Flies produce ma...
06/08/09 Gravy is boiled . Flask is open. Gravy is teeming  with microorganisms. Gravy is boiled . Flask is sealed. Gravy ...
Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is  teeming with microorganisms...
Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is  teeming with microorganisms...
Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is  teeming with microorganisms...
Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is  teeming with microorganisms...
Assessment <ul><li>Active Art Redi and Pasteur Assesment </li></ul>
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Biology Scientific Method

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  • Transcript of "Biology Scientific Method"

    1. 1. Scientific Method <ul><li>The scientific method is a series of steps taken during an experiment in order to solve a problem. </li></ul>
    2. 2. Why is the Scientific Method Important? <ul><li>Continuity </li></ul><ul><li>Communication within the scientific community </li></ul>1
    3. 3. Steps of the Scientific Method <ul><li>Observation </li></ul><ul><li>State the problem </li></ul><ul><li>Form a hypothesis </li></ul><ul><li>Experiment </li></ul><ul><li>Results/Data </li></ul><ul><li>Analysis </li></ul>2
    4. 4. Observations <ul><li>Qualitative observation </li></ul><ul><ul><li>Focus on the qualities of an object. </li></ul></ul><ul><ul><li>Ex. Color of an object </li></ul></ul><ul><li>Quantitative observation </li></ul><ul><ul><li>Characteristics of an object that can be measured. </li></ul></ul><ul><ul><li>Ex. Mass, Length </li></ul></ul>3
    5. 5. State the Problem <ul><li>This problem or question is formed from your observations. </li></ul><ul><li>This is the question you as the scientist want answered. </li></ul><ul><li>Also called the “purpose”. </li></ul>4
    6. 6. Form a Hypothesis <ul><li>The hypothesis is a testable explanation to your problem. </li></ul><ul><li>“ Educated Guess” is not enough. You must be able to test your explanation. </li></ul>5
    7. 7. Experiment <ul><li>Design an experiment that tests your hypothesis. </li></ul><ul><li>Control Group: test variables are kept constant </li></ul><ul><li>“ Normal Conditions” </li></ul><ul><li>Experimental Group: variables are changed </li></ul>6
    8. 8. Variables <ul><li>Variables – anything that changes throughout the experiment. </li></ul><ul><li>There are two types of variables: </li></ul><ul><ul><li>Independent variable – the change that the experimenter controls. </li></ul></ul><ul><ul><li>Dependent variable – the change that is measured. </li></ul></ul>
    9. 9. Results/Analysis <ul><li>Results </li></ul><ul><ul><li>This section includes all of the data and information collected. </li></ul></ul><ul><ul><li>How do you present your data? </li></ul></ul><ul><li>Analysis </li></ul><ul><ul><li>The data is explained and the process is wrapped up. </li></ul></ul>7
    10. 10. OBSERVATIONS: Flies land on meat that is left uncovered. Later, maggots appear on the meat. HYPOTHESIS: Flies produce maggots. PROCEDURE Controlled Variables: jars, type of meat, location, temperature, time Manipulated Variables: gauze covering that keeps flies away from meat Uncovered jars Covered jars Several days pass Maggots appear No maggots appear Responding Variable: whether maggots appear CONCLUSION: Maggots form only when flies come in contact with meat. Spontaneous generation of maggots did not occur. Redi’s experiment Spontaneous Generation – Life arises from non- living things
    11. 11. 06/08/09 Gravy is boiled . Flask is open. Gravy is teeming with microorganisms. Gravy is boiled . Flask is sealed. Gravy is free of microorganisms . Section 1-2 Figure 1-10 Spallanzani’s Experiment Spallanzani’s Experiment Theory not supported “vital force in air was killed”
    12. 12. Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is teeming with microorganisms. Pasteur intro Figure 1-11 Pasteur’s Experiment Pasteur’s Experiment Pasteur changed 1 variable in the experiment – he used a curved neck flask
    13. 13. Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is teeming with microorganisms. Section 1-2 Figure 1-11 Pasteur’s Experiment The curved neck of the flask allowed air to mix in the jar but not bacteria
    14. 14. Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is teeming with microorganisms. Section 1-2 Figure 1-11 Pasteur’s Experiment
    15. 15. Broth is boiled. Broth is free of microorganisms for a year. Curved neck is removed. Broth is teeming with microorganisms. Section 1-2 Figure 1-11 Pasteur’s Experiment Once the neck was removed bacteria entered and spoiled the broth
    16. 16. Assessment <ul><li>Active Art Redi and Pasteur Assesment </li></ul>

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